Engine-lathe



(No Model.) 2 Shee,tsSheet 1.

J. PLATHER.

ENGINE LATHE.

No. 398,601. Patented Feb. 26, 1889. I

MW! WW WI 1 W FIG... I

lNVENT UR WITNEEIEEE 2 Sheets-Sheet 2.

J. FLATHER.

ENGINE LATHE.

(No Model.) 7

Nirnn STATES PATENT @rrrcn.

JOSEPH FLATHER, OF NASHUA, NEW HAMPSHIRE.

ENGINE-LATHE.

SPECIFICATION forming part of Letters Patent No. 398,601, dated February 26, 1889.

Application filed June 21, 1888. $e1'ial N0. 277,757 (No model.)

To all whom it may concern;

Be it known that I, Josnrn FLATHE'R, of Xashua, in the county of Hillsborough and State of New Hampshire, have invented a new and useful. Improvement in Engine- Lathes, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the api Fig. 4 is a detached horizontal see I This invention relates to that class of lathes 1 known to mechanics and the trade as engine-lathes, which are provided with a reversible automatic feed mechanism; and my invention relates to the means for reversing the feed mechanism; and it con sists in features of novelty which will be heroin pointed out, and specified in the claims.

Referring again to the drawings, A reprc- 1 sents thehead-stock; B, the spindle journaled i in suitable bearTngs secured in stock A; C, the cone-pulley mounted on arbor B; D, the

of stockA, and upon said carrier are mounted the intermediate gears, e f, pivoted upon their respective studs q, secured in the upper part of said carrier. Said gears are always enmeshed each with the other, and gear 6 always enmeshed with gear I) on spindle n, as shown.

For the purpose of rocking carrier (I, (as will be explained) an arm, g, thereof extends forward, as shown in F 2 and 4, and by raising said arm, gear e is enmeshed with gear F, when gears F e I) become a three-gear train, gears F andb of course revolving in the same direction as do their respective spindles on which they are secured; and when said arm is fully depressed gear 6 is released from gear F, and gears f F are enmeshed, when gears F, f, e, and I) become a four-gear train, and spindles B a revolve in opposite directions. \Vhen said lever g is arranged midway between its highest and lowest limit, then both gears e and f are liberated from gear F, and they, as also gear Z) and its spindle, are at rest or non-rotative. These several gears, their movements, and described mode of operation are all old in this art; but to actuate and control said rocking carrier and its gears l have invented the following means:

A cam, 21, having a spiral cam-groove,j, is pivoted to the base of stock A by the selflocking screw 7;, a hollow boss, m, being preferably formed integral with the stock, in which larger gear secured upon B, and E the smaller gear secured to cone C, said several parts being old in their construction, arrangement, and mode of operation, the gears being I a part of what is known as the back-gear- 1 ing, the coacting gears and their adjustable or rocking shaft not being shown, as my in- E vention has no direct relation therewith, and would perform the same function whether such back-gearin was employed or not. Between the back journal-box of spindle B and gear E is arranged the feed-gear F, rigidly secured upon said spindle in the usual manner. Below spindle B is arranged the feedspindle a, journaled in stock A and car-l rying the gear I), rigidly secured upon it directly beneath said feed-gear F, secured on spindle B. A gear-carrier, d, is mounted upon spindle a between gearband the rear upright to seat raid cam, as shown. A stud, 71, secured in arm g, Figs. 2 and 4, engages in groove in the cam, and by rotating the latter by its lever 19 said arm is vertically adjusted as desired. Said cam-groove is opened to the lower end or face of the cam, as shown in Fig. 5, in order to insert the stud in the groove after the lever and stud are in place in the stock. Said groove is carried up just far enough to allow the desired upward movement of arm g to properly engage gear c with gear F, while to control the downward movementof said lover a conical-pointed screw, 7, is threaded in stock A to serve as an adjustable stop for the lever.

In Fig. i the several positions of lever p when adjusting the cam are shown, to wit: hen turned to the right, arm 9 is depressed and gearfenmeshed with gear F. \Vhen turned to the left, the arm is raised. and gear a is enmeshed with gear F, and when intermediate, both gears e andf are freed from gear F, as above specified. In order to form the slot or space in the wall of A for arm 9 as small as practicable, the stud 7L is inserted and se cured in the arm after the latter is in place, the stud being entered through the opening .in boss m before the cam is seated therein;

and to obtain access to the diminished end of the stud to rivet it in the arm, as shown, I form a threaded opening for plug-screw t in the end wall of A, opposite to said stud, said screw, when inserted in said opening, serving as an adj nstable bearing to prevent side movement or thrust of said arm, and as a means of locking said arm if necessary. It will be obvious that the method of engaging said arm 9 and the cam may be Varied without departing from the spirit of my in vention, for the side or end of the arm may be formed with teeth like those in a tangentwheel, while the cam may he cut as an endless screw, thus constituting the conventional worm-gear; but all such connections are well-known equivalents of the groove and pin shown and described.

Upon the outside of stock A the cone pnlley c is secured to spindle a ,.a belt from said pulley engaging a corresponding pulley on the feed-rod below in a well-known manner;

and if the lathe be what is termed a screwcutting lathe then removable gears are secured on said spindle, outside pulley c, to engage an intermediate gear, by which motion is positivelytransmitted to the screw-cutting feed-rod in an equally well-knownmanner.

I claim as my invention 1. In an engine-lathe, the combination, with gear-carrier (Z, hax ing arm g, provided with the side stud, 71, of cam if, mounted on vertical axis k and formed with spiral groove (1, interlocked with said stud and provided with lever p, all substantially as specified.

2. The combination of gear-carrier d, cam i, and the adjustable arm-supporting screw 2, arranged at the side of said arm, substan tially as specified.

3. The combination of spindle B, feed-gear F, secured thereon, feed-spindle a, with its fixed gear 1), gear-carrierd, having arm 9, with its stud h, gears e f, mounted on said carrier, and cam '2', mounted on its axis 10 and formed with'groove 'j, interlocked with said stud h and arranged toactuat e said carrier, all substantially as specified.

JOSEPH FLATHER.

Witnesses:

T. W. PORTER, EUGENE HUMPHREY. 

